**Extra Help tomorrow after school** **Quiz Friday (1.12 ...€¦ · complete rotation on its axis...

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22 1.16.notebook 1 October 11, 2017 Oct 57:50 AM October 11, 2017 Lesson 1.16 - Rotations on the Coordinate Plane **Extra Help tomorrow after school** **Quiz Friday (1.12 to 1.17)** Oct 109:56 AM HW

Transcript of **Extra Help tomorrow after school** **Quiz Friday (1.12 ...€¦ · complete rotation on its axis...

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    October 11, 2017

    Oct 57:50 AM

    October 11, 2017Lesson 1.16 - Rotations on the Coordinate Plane

    **Extra Help tomorrow after school****Quiz Friday (1.12 to 1.17)**

    Oct 109:56 AM

    HW

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    http://www.mathwarehouse.com/transformations/rotationsinmath.php

    Demonstration to determine the rules of Rotations!

    Let's pick a point to see where it goes after a rotation of 90, 180, and 270 degrees.

    R90 (         )    (         )

    R180(         )    (         )

    R270(         )    (         )

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    http://www.mathwarehouse.com/transformations/rotations-in-math.php

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    Rorigin,270 (x, y) --> (y,-x)

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    *Switch and make first one opposite sign*

    Rorigin,90 (x, y) --> ( )Rorigin,180 (x, y) --> ( )Rorigin,270 (x, y) --> ( )

    Rorigin,0 (x, y) --> ( )*Clockwise (to right)*

    -90 = 270-180 = 180-270 = 90

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    October 11, 2017

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